Once you get past the surface prep, you can use any paint you want. Depending on the quality of your piece it can take some blocking to get it to not look like wavy glass. Many parts come out of the mold to quickly or uneven and as it cures it shrinks. The surface can be slightly undulating and fibers exposed. We use to use a high-build two part polyester spray on filler to adhere, seal and prep as an under coat over glass. I don't know what is available today but you get the idea. Otherwise paint away.